Improvement in mechanical movements



J. I. McCORM'ICK.

MECHANICAL-MOVEMENT. No. 171,399. Patented Dec. 21,1875.

Win/619060; A4 v v Q UNITED STATES PATENT OFFICE.

JAMES F. MCCORMICK, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. 17 L399, dated December 21,1875; application filed October 20, 1875.

To all whom it may concern:

Be it known that I, JAMES F. MoGomnoK, of Philadelphia, Pennsylvania, have invented a new Mechanical Movement, of which the following is a specification:

The object of my invention is to convert a comparatively slow rotary motion into a rapid vibrating or reciprocating motion, and this object I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawing.

In the present instance the device is illustrated as applied to the vibration of the comb A of a carding-engine, the comb being connected by adjustable arms a, one only of which is shown in the drawing, to a shaft, B, which has its bearing in the frame D of the machine. To the shaft B is secured an arm, Gr, carrying an adjustable pin, H, forked at its outer end for the reception of an endless band, K, which is driven by an adjacent pulley, and adapted to recesses or grooves in the ends of the arms m of the wheel M, the latter having, in the present instance, siX arms, and being arranged to revolve on a pin, 61, attached to any fixed object. As this wheel M is revolved by the endless band thelatter must, owing to the arms m of the said wheel, be alternately raised and lowered, the extent of the movement of the band in thepresentinstance bein gin'dicatedbythe plain and dotted lines in Fig. 1. This movement of the band necessarily results in a vibrating motion of the arm G and comb A, the extent of the vibration of the comb depending partly upon the distance apart of the arms m, and

partly on the position of the pin H on the arm G. The vibration of this arm is not positive, as it is imparted through the band as an elasticthe revolving wheel'M and its arms m, the

endless band K and the arm G, with its pin H, all being combined and operating substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAS. F. McGOBMIOK. Witnesses:

HARRY HoWsoN,'Jr., HARRY SMITH. 

